425421947 has 2 divisors, whose sum is σ = 425421948. Its totient is φ = 425421946.

The previous prime is 425421943. The next prime is 425421973. The reversal of 425421947 is 749124524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425421947 - 2² = 425421943 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 425421947.

It is not a weakly prime, because it can be changed into another prime (425421943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212710973 + 212710974.

It is an arithmetic number, because the mean of its divisors is an integer number (212710974).

Almost surely, 2^425421947 is an apocalyptic number.

425421947 is a deficient number, since it is larger than the sum of its proper divisors (1).

425421947 is an equidigital number, since it uses as much as digits as its factorization.

425421947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 425421947 is about 20625.7593072352. The cubic root of 425421947 is about 752.0960312655.

The spelling of 425421947 in words is "four hundred twenty-five million, four hundred twenty-one thousand, nine hundred forty-seven".